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<title>5.1.1 Available Types</title>
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<h2><a name="SECTION007110000000000000000">
5.1.1 Available Types</a>
</h2>

<p>
<dl><dt><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-605' xml:id='l2h-605' class="class">date</tt></b>
<dd>
  An idealized naive date, assuming the current Gregorian calendar
  always was, and always will be, in effect.
  Attributes: <tt class="member">year</tt>, <tt class="member">month</tt>, and <tt class="member">day</tt>.
</dl>

<p>
<dl><dt><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-606' xml:id='l2h-606' class="class">time</tt></b>
<dd>
  An idealized time, independent of any particular day, assuming
  that every day has exactly 24*60*60 seconds (there is no notion
  of "leap seconds" here).
  Attributes: <tt class="member">hour</tt>, <tt class="member">minute</tt>, <tt class="member">second</tt>,
              <tt class="member">microsecond</tt>, and <tt class="member">tzinfo</tt>.
</dl>

<p>
<dl><dt><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-607' xml:id='l2h-607' class="class">datetime</tt></b>
<dd>
  A combination of a date and a time.
  Attributes: <tt class="member">year</tt>, <tt class="member">month</tt>, <tt class="member">day</tt>,
              <tt class="member">hour</tt>, <tt class="member">minute</tt>, <tt class="member">second</tt>,
              <tt class="member">microsecond</tt>, and <tt class="member">tzinfo</tt>.
</dl>

<p>
<dl><dt><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-608' xml:id='l2h-608' class="class">timedelta</tt></b>
<dd>
  A duration expressing the difference between two <tt class="class">date</tt>,
  <tt class="class">time</tt>, or <tt class="class">datetime</tt> instances to microsecond
  resolution.
</dl>

<p>
<dl><dt><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-609' xml:id='l2h-609' class="class">tzinfo</tt></b>
<dd>
  An abstract base class for time zone information objects.  These
  are used by the  <tt class="class">datetime</tt> and <tt class="class">time</tt> classes to
  provide a customizable notion of time adjustment (for example, to
  account for time zone and/or daylight saving time).
</dl>

<p>
Objects of these types are immutable.

<p>
Objects of the <tt class="class">date</tt> type are always naive.

<p>
An object <var>d</var> of type <tt class="class">time</tt> or <tt class="class">datetime</tt> may be
naive or aware.  <var>d</var> is aware if <code><var>d</var>.tzinfo</code> is not
<code>None</code> and <code><var>d</var>.tzinfo.utcoffset(<var>d</var>)</code> does not return
<code>None</code>.  If <code><var>d</var>.tzinfo</code> is <code>None</code>, or if
<code><var>d</var>.tzinfo</code> is not <code>None</code> but
<code><var>d</var>.tzinfo.utcoffset(<var>d</var>)</code> returns <code>None</code>, <var>d</var>
is naive.

<p>
The distinction between naive and aware doesn't apply to
<tt class="class">timedelta</tt> objects.

<p>
Subclass relationships:

<p>
<div class="verbatim"><pre>
object
    timedelta
    tzinfo
    time
    date
        datetime
</pre></div>

<p>

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<span class="release-info">Release 2.5.1, documentation updated on 18th April, 2007.</span>
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